随机按钮 Android 项目
Random button Android project
我想制作一个应用程序，当您单击一个按钮时，它会转到屏幕上的随机位置。我希望它是一个 ImageButton，当 onClick 很好地转到屏幕上的随机位置时。我以前试过。但没有成功。这是我已经尝试过的一些代码。 --->
package com.example.e99900004533.candycollector;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.graphics.Point;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Display;
import android.view.ViewGroup.MarginLayoutParams;
import android.animation.ObjectAnimator;
import android.widget.RelativeLayout;
import android.widget.EditText;
import android.widget.ImageButton;
import java.util.Random;
public class MainActivity extends ActionBarActivity {
public EditText collectedTextEdit;
public ImageButton candyEdit;
public int collected = 0;
public int screenWidth = 300;
public int screenHeight = 300;
Random random = new Random();
public boolean running = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
collectedTextEdit = (EditText) findViewById(R.id.collectedText);
candyEdit = (ImageButton) findViewById(R.id.candy);
collectedTextEdit.setText("Collected: " + collected);
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
screenWidth = size.x;
screenHeight = size.y;
addListenerOnButton();
}
public void addListenerOnButton() {
candyEdit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
collected += 1;
collectedTextEdit.setText("Collected: " + collected);
int candyX = random.nextInt(screenWidth - 50);
int candyY = random.nextInt(screenHeight - 50);
System.out.println(candyX + " : " + candyY);
MarginLayoutParams marginParams = new MarginLayoutParams(candyEdit.getLayoutParams());
marginParams.setMargins(candyX, candyY, 0, 0);
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(marginParams);
candyEdit.setLayoutParams(layoutParams);
//if (candyX > screenWidth) {
//screenWidth -= 50;
//layoutParams.setMargins(candyX, candyY, candyX, LayoutParams.WRAP_CONTENT);
//candyEdit.setLayoutParams(layoutParams);
//}
//if (candyY > screenHeight) {
//screenHeight -= 50;
//layoutParams.setMargins(candyX, candyY, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
//candyEdit.setLayoutParams(layoutParams);
//}
//while (running == true) {
//candyY -= 1;
//layoutParams.setMargins(candyX, candyY, candyX, candyY);
//candyEdit.setLayoutParams(layoutParams);
//}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
我希望您正在使用 Android Studio，因为它为您提供了一种访问 Android API 的所有好处的美妙方式。
无论如何，在我 post 代码之前，您在 java 代码中设置了 onClickListener，虽然这很好，但它会使您的代码混乱。一个更美观的解决方案是使用 XML 和一个按钮的 android:onClick。您将在代码中看到这一点。
Java:
package testinc.com.randombutton;
import android.graphics.Point;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.*;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.Random;
public class MainActivity extends ActionBarActivity {
// Encapsulating the data just to be safe...
private int collected = 0;
private int screenWidth = 300;
private int screenHeight = 300;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
screenWidth = size.x;
screenHeight = size.y;
TextView collectedView = (TextView) findViewById(R.id.collectedTV);
collectedView.setText("Collected: " + collected);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void toRandomPosition(View view) {
// Based on our collection candy collection:
collected += 1;
TextView collectedView = (TextView) findViewById(R.id.collectedTV);
collectedView.setText("Collected: " + collected);
// Based on position of our candy:
Random random = new Random();
// Understand nextInt(N) will go from 0 -> N-1, also are you trying to control where it can go?
float candyX = (float) random.nextInt(screenWidth - 50);
float candyY = (float) random.nextInt(screenHeight - 50);
// I didn't write it, but you need to check these float values if they exceed the screen width and the screen length. */
// Sout to check coordinates
System.out.println(candyX + " : " + candyY);
// To change margins:
ImageButton imgButton = (ImageButton) findViewById(R.id.changePlace);
imgButton.setX(candyX);
imgButton.setY(candyY);
}
}
Android:
注意：我使用了线性布局，因为我不喜欢相对。我想您可以更改它而不会产生任何影响。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<TextView android:id="@+id/collectedTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ImageButton android:id="@+id/changePlace"
android:onClick="toRandomPosition"
android:contentDescription="It's a button, ha za"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
关键部分：
android:onClick="toRandomPosition" 与方法挂钩，public void toRandomPosition(View view)
setX和setY需要浮点数来设置位置。不幸的是，随机 class 似乎在其 class 中没有 nextFloat(float n) 。我建议暂时将 int 转换为 float。
看到我现在正在这样做，这里是一个可能的（我没有检查过）坐标超出屏幕范围的解决方案：
while ( candyX >= screenWidth || candyY >= screenHeight) {
candyX = (float) random.nextInt(screenWidth - 50);
candyY = (float) random.nextInt(screenHeight - 50);
}
我检查了位置是否相等，因为屏幕角落的按钮很难找到并且可能会偏离显示屏。
我想制作一个应用程序，当您单击一个按钮时，它会转到屏幕上的随机位置。我希望它是一个 ImageButton，当 onClick 很好地转到屏幕上的随机位置时。我以前试过。但没有成功。这是我已经尝试过的一些代码。 --->
package com.example.e99900004533.candycollector;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.graphics.Point;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.Display;
import android.view.ViewGroup.MarginLayoutParams;
import android.animation.ObjectAnimator;
import android.widget.RelativeLayout;
import android.widget.EditText;
import android.widget.ImageButton;
import java.util.Random;
public class MainActivity extends ActionBarActivity {
public EditText collectedTextEdit;
public ImageButton candyEdit;
public int collected = 0;
public int screenWidth = 300;
public int screenHeight = 300;
Random random = new Random();
public boolean running = true;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
collectedTextEdit = (EditText) findViewById(R.id.collectedText);
candyEdit = (ImageButton) findViewById(R.id.candy);
collectedTextEdit.setText("Collected: " + collected);
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
screenWidth = size.x;
screenHeight = size.y;
addListenerOnButton();
}
public void addListenerOnButton() {
candyEdit.setOnClickListener(new OnClickListener() {
@Override
public void onClick(View v) {
collected += 1;
collectedTextEdit.setText("Collected: " + collected);
int candyX = random.nextInt(screenWidth - 50);
int candyY = random.nextInt(screenHeight - 50);
System.out.println(candyX + " : " + candyY);
MarginLayoutParams marginParams = new MarginLayoutParams(candyEdit.getLayoutParams());
marginParams.setMargins(candyX, candyY, 0, 0);
RelativeLayout.LayoutParams layoutParams = new RelativeLayout.LayoutParams(marginParams);
candyEdit.setLayoutParams(layoutParams);
//if (candyX > screenWidth) {
//screenWidth -= 50;
//layoutParams.setMargins(candyX, candyY, candyX, LayoutParams.WRAP_CONTENT);
//candyEdit.setLayoutParams(layoutParams);
//}
//if (candyY > screenHeight) {
//screenHeight -= 50;
//layoutParams.setMargins(candyX, candyY, LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
//candyEdit.setLayoutParams(layoutParams);
//}
//while (running == true) {
//candyY -= 1;
//layoutParams.setMargins(candyX, candyY, candyX, candyY);
//candyEdit.setLayoutParams(layoutParams);
//}
}
});
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
}
我希望您正在使用 Android Studio，因为它为您提供了一种访问 Android API 的所有好处的美妙方式。
无论如何，在我 post 代码之前，您在 java 代码中设置了 onClickListener，虽然这很好，但它会使您的代码混乱。一个更美观的解决方案是使用 XML 和一个按钮的 android:onClick。您将在代码中看到这一点。
Java:
package testinc.com.randombutton;
import android.graphics.Point;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.*;
import android.widget.ImageButton;
import android.widget.LinearLayout;
import android.widget.TextView;
import java.util.Random;
public class MainActivity extends ActionBarActivity {
// Encapsulating the data just to be safe...
private int collected = 0;
private int screenWidth = 300;
private int screenHeight = 300;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Display display = getWindowManager().getDefaultDisplay();
Point size = new Point();
display.getSize(size);
screenWidth = size.x;
screenHeight = size.y;
TextView collectedView = (TextView) findViewById(R.id.collectedTV);
collectedView.setText("Collected: " + collected);
}
@Override
public boolean onCreateOptionsMenu(Menu menu) {
// Inflate the menu; this adds items to the action bar if it is present.
getMenuInflater().inflate(R.menu.menu_main, menu);
return true;
}
@Override
public boolean onOptionsItemSelected(MenuItem item) {
// Handle action bar item clicks here. The action bar will
// automatically handle clicks on the Home/Up button, so long
// as you specify a parent activity in AndroidManifest.xml.
int id = item.getItemId();
//noinspection SimplifiableIfStatement
if (id == R.id.action_settings) {
return true;
}
return super.onOptionsItemSelected(item);
}
public void toRandomPosition(View view) {
// Based on our collection candy collection:
collected += 1;
TextView collectedView = (TextView) findViewById(R.id.collectedTV);
collectedView.setText("Collected: " + collected);
// Based on position of our candy:
Random random = new Random();
// Understand nextInt(N) will go from 0 -> N-1, also are you trying to control where it can go?
float candyX = (float) random.nextInt(screenWidth - 50);
float candyY = (float) random.nextInt(screenHeight - 50);
// I didn't write it, but you need to check these float values if they exceed the screen width and the screen length. */
// Sout to check coordinates
System.out.println(candyX + " : " + candyY);
// To change margins:
ImageButton imgButton = (ImageButton) findViewById(R.id.changePlace);
imgButton.setX(candyX);
imgButton.setY(candyY);
}
}
Android: 注意：我使用了线性布局，因为我不喜欢相对。我想您可以更改它而不会产生任何影响。
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:tools="http://schemas.android.com/tools"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:paddingLeft="@dimen/activity_horizontal_margin"
android:paddingRight="@dimen/activity_horizontal_margin"
android:paddingTop="@dimen/activity_vertical_margin"
android:paddingBottom="@dimen/activity_vertical_margin"
tools:context=".MainActivity">
<TextView android:id="@+id/collectedTV"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
<ImageButton android:id="@+id/changePlace"
android:onClick="toRandomPosition"
android:contentDescription="It's a button, ha za"
android:layout_width="wrap_content"
android:layout_height="wrap_content"/>
</LinearLayout>
关键部分：
android:onClick="toRandomPosition" 与方法挂钩，public void toRandomPosition(View view)
setX和setY需要浮点数来设置位置。不幸的是，随机 class 似乎在其 class 中没有 nextFloat(float n) 。我建议暂时将 int 转换为 float。
看到我现在正在这样做，这里是一个可能的（我没有检查过）坐标超出屏幕范围的解决方案：
while ( candyX >= screenWidth || candyY >= screenHeight) {
candyX = (float) random.nextInt(screenWidth - 50);
candyY = (float) random.nextInt(screenHeight - 50);
}
我检查了位置是否相等，因为屏幕角落的按钮很难找到并且可能会偏离显示屏。