Android Studio:使用 Intent 传递多个值仅提供 1 个值?
Android Studio: Passing multiple values using intent PROVIDES ONLY 1 VALUE?
我正在尝试做一个测验,让用户在每个 activity 中选择一个答案,最后一页会根据所选选项提供答案。因此,我想将这些值传递给最终 activity,但似乎只显示最后选择的值。
第一个Activity:
public class Quiz extends Activity {
Button btn;
RadioGroup rg;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz);
btn = (Button) findViewById(R.id.nextBtn);
rg= (RadioGroup) findViewById(R.id.rg);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (rg.getCheckedRadioButtonId() == -1) {
Toast.makeText(getApplicationContext(), "Please select an answer",
Toast.LENGTH_SHORT).show();
} else{
Intent intent = new Intent(getApplicationContext(), Quiz1.class);
Bundle bundle = new Bundle();
int id = rg.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) findViewById(id);
bundle.putString("rg", radioButton.getText().toString());
intent.putExtras(bundle);
startActivity(intent);
}
}
});
}
}
第二个Activity:
public class Quiz1 extends Activity {
Button btn;
RadioGroup rg1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz1);
btn = (Button) findViewById(R.id.nextBtn1);
rg1= (RadioGroup) findViewById(R.id.rg1);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (rg1.getCheckedRadioButtonId() == -1) {
Toast.makeText(getApplicationContext(), "Please select an answer",
Toast.LENGTH_SHORT).show();
} else{
Intent intent1 = new Intent(getApplicationContext(), Quiz2.class);
Bundle bundle1 = new Bundle();
int id = rg1.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) findViewById(id);
bundle1.putString("rg1", radioButton.getText().toString());
intent1.putExtras(bundle1);
startActivity(intent1);
}
}
});
}
}
现在总共有 7 个活动.. 不包括最后的 activity
这是第 7 个(称为 Quiz6)activity:
public class Quiz6 extends Activity {
Button btn;
RadioGroup rg6;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz6);
btn = (Button) findViewById(R.id.nextBtn6);
rg6= (RadioGroup) findViewById(R.id.rg6);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (rg6.getCheckedRadioButtonId() == -1) {
Toast.makeText(getApplicationContext(), "Please select an answer",
Toast.LENGTH_SHORT).show();
} else{
Intent intent6 = new Intent(getApplicationContext(), Final1.class);
Bundle bundle6 = new Bundle();
int id = rg6.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) findViewById(id);
bundle6.putString("rg6", radioButton.getText().toString());
intent6.putExtras(bundle6);
startActivity(intent6);
}
}
});
}
}
你明白了:)
这是最终的 activity(称为 Final1)这里显示的是结果
这是代码
public class Final1 extends Activity {
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.final1);
Bundle bundle = getIntent().getExtras();
TextView textView = (TextView)findViewById(R.id.txt);
textView.setText(bundle.getCharSequence("rg"));
Bundle bundle1 = getIntent().getExtras();
TextView textView1 = (TextView)findViewById(R.id.txt1);
textView.setText(bundle1.getCharSequence("rg1"));
Bundle bundle2 = getIntent().getExtras();
TextView textView2 = (TextView)findViewById(R.id.txt2);
textView.setText(bundle2.getCharSequence("rg2"));
Bundle bundle3 = getIntent().getExtras();
TextView textView3 = (TextView)findViewById(R.id.txt3);
textView.setText(bundle3.getCharSequence("rg3"));
Bundle bundle4 = getIntent().getExtras();
TextView textView4 = (TextView)findViewById(R.id.txt4);
textView.setText(bundle4.getCharSequence("rg4"));
Bundle bundle5 = getIntent().getExtras();
TextView textView5 = (TextView)findViewById(R.id.txt5);
textView.setText(bundle5.getCharSequence("rg5"));
Bundle bundle6 = getIntent().getExtras();
TextView textView6 = (TextView)findViewById(R.id.txt6);
textView.setText(bundle6.getCharSequence("rg6"));
btn = (Button)findViewById(R.id.restartBtn);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent in = new Intent(v.getContext(), Quiz.class);
startActivityForResult(in, 0);
}
});
}
}
一旦我 运行 程序最终会发生什么,只有 "textView" 最终会在最终 activity 之前更改为 activity 上的所选选项,如上所示
感谢任何帮助,非常感谢 <3
一个 activity 的意图只有一个 Bundle
与之关联。因此,您只将最后一个包传递给最终的 activity,其他的则传递给紧随其后的 activity。您可以通过执行
来解决此问题
Bundle bundle = getIntent().getExtras(); //this gets the current activity's extras
RadioButton radioButton = (RadioButton) findViewById(id);
bundle.putString("rg1", radioButton.getText().toString());
intent.putExtras(bundle);
startActivity(intent);
而不是像现在这样每次都创建一个新的包。然后将此捆绑包传递给以下 activity。这样,每次您得到一个新答案时,您都会将其添加到您的答案包中,而不是每次都创建一个只有一个项目的新包。
那么在你的期末activity中,你只需要拿到一个包,就可以从中提取所有的答案。注意:您需要确保使用正确的文本更新正确的文本视图。在你的问题中,textView
是唯一被更新的视图,6 次,其他的根本没有得到更新。
Bundle bundle = getIntent().getExtras();
TextView textView = (TextView)findViewById(R.id.txt);
textView.setText(bundle.getCharSequence("rg"));
TextView textView1 = (TextView)findViewById(R.id.txt1);
textView1.setText(bundle.getCharSequence("rg1"));
TextView textView2 = (TextView)findViewById(R.id.txt2);
textView2.setText(bundle.getCharSequence("rg2"));
TextView textView3 = (TextView)findViewById(R.id.txt3);
textView3.setText(bundle.getCharSequence("rg3"));
TextView textView4 = (TextView)findViewById(R.id.txt4);
textView4.setText(bundle.getCharSequence("rg4"));
TextView textView5 = (TextView)findViewById(R.id.txt5);
textView5.setText(bundle.getCharSequence("rg5"));
TextView textView6 = (TextView)findViewById(R.id.txt6);
textView6.setText(bundle.getCharSequence("rg6"));
我正在尝试做一个测验,让用户在每个 activity 中选择一个答案,最后一页会根据所选选项提供答案。因此,我想将这些值传递给最终 activity,但似乎只显示最后选择的值。
第一个Activity:
public class Quiz extends Activity {
Button btn;
RadioGroup rg;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz);
btn = (Button) findViewById(R.id.nextBtn);
rg= (RadioGroup) findViewById(R.id.rg);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (rg.getCheckedRadioButtonId() == -1) {
Toast.makeText(getApplicationContext(), "Please select an answer",
Toast.LENGTH_SHORT).show();
} else{
Intent intent = new Intent(getApplicationContext(), Quiz1.class);
Bundle bundle = new Bundle();
int id = rg.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) findViewById(id);
bundle.putString("rg", radioButton.getText().toString());
intent.putExtras(bundle);
startActivity(intent);
}
}
});
}
}
第二个Activity:
public class Quiz1 extends Activity {
Button btn;
RadioGroup rg1;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz1);
btn = (Button) findViewById(R.id.nextBtn1);
rg1= (RadioGroup) findViewById(R.id.rg1);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (rg1.getCheckedRadioButtonId() == -1) {
Toast.makeText(getApplicationContext(), "Please select an answer",
Toast.LENGTH_SHORT).show();
} else{
Intent intent1 = new Intent(getApplicationContext(), Quiz2.class);
Bundle bundle1 = new Bundle();
int id = rg1.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) findViewById(id);
bundle1.putString("rg1", radioButton.getText().toString());
intent1.putExtras(bundle1);
startActivity(intent1);
}
}
});
}
}
现在总共有 7 个活动.. 不包括最后的 activity 这是第 7 个(称为 Quiz6)activity:
public class Quiz6 extends Activity {
Button btn;
RadioGroup rg6;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.quiz6);
btn = (Button) findViewById(R.id.nextBtn6);
rg6= (RadioGroup) findViewById(R.id.rg6);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
if (rg6.getCheckedRadioButtonId() == -1) {
Toast.makeText(getApplicationContext(), "Please select an answer",
Toast.LENGTH_SHORT).show();
} else{
Intent intent6 = new Intent(getApplicationContext(), Final1.class);
Bundle bundle6 = new Bundle();
int id = rg6.getCheckedRadioButtonId();
RadioButton radioButton = (RadioButton) findViewById(id);
bundle6.putString("rg6", radioButton.getText().toString());
intent6.putExtras(bundle6);
startActivity(intent6);
}
}
});
}
}
你明白了:)
这是最终的 activity(称为 Final1)这里显示的是结果
这是代码
public class Final1 extends Activity {
Button btn;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.final1);
Bundle bundle = getIntent().getExtras();
TextView textView = (TextView)findViewById(R.id.txt);
textView.setText(bundle.getCharSequence("rg"));
Bundle bundle1 = getIntent().getExtras();
TextView textView1 = (TextView)findViewById(R.id.txt1);
textView.setText(bundle1.getCharSequence("rg1"));
Bundle bundle2 = getIntent().getExtras();
TextView textView2 = (TextView)findViewById(R.id.txt2);
textView.setText(bundle2.getCharSequence("rg2"));
Bundle bundle3 = getIntent().getExtras();
TextView textView3 = (TextView)findViewById(R.id.txt3);
textView.setText(bundle3.getCharSequence("rg3"));
Bundle bundle4 = getIntent().getExtras();
TextView textView4 = (TextView)findViewById(R.id.txt4);
textView.setText(bundle4.getCharSequence("rg4"));
Bundle bundle5 = getIntent().getExtras();
TextView textView5 = (TextView)findViewById(R.id.txt5);
textView.setText(bundle5.getCharSequence("rg5"));
Bundle bundle6 = getIntent().getExtras();
TextView textView6 = (TextView)findViewById(R.id.txt6);
textView.setText(bundle6.getCharSequence("rg6"));
btn = (Button)findViewById(R.id.restartBtn);
btn.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
Intent in = new Intent(v.getContext(), Quiz.class);
startActivityForResult(in, 0);
}
});
}
}
一旦我 运行 程序最终会发生什么,只有 "textView" 最终会在最终 activity 之前更改为 activity 上的所选选项,如上所示
感谢任何帮助,非常感谢 <3
一个 activity 的意图只有一个 Bundle
与之关联。因此,您只将最后一个包传递给最终的 activity,其他的则传递给紧随其后的 activity。您可以通过执行
Bundle bundle = getIntent().getExtras(); //this gets the current activity's extras
RadioButton radioButton = (RadioButton) findViewById(id);
bundle.putString("rg1", radioButton.getText().toString());
intent.putExtras(bundle);
startActivity(intent);
而不是像现在这样每次都创建一个新的包。然后将此捆绑包传递给以下 activity。这样,每次您得到一个新答案时,您都会将其添加到您的答案包中,而不是每次都创建一个只有一个项目的新包。
那么在你的期末activity中,你只需要拿到一个包,就可以从中提取所有的答案。注意:您需要确保使用正确的文本更新正确的文本视图。在你的问题中,textView
是唯一被更新的视图,6 次,其他的根本没有得到更新。
Bundle bundle = getIntent().getExtras();
TextView textView = (TextView)findViewById(R.id.txt);
textView.setText(bundle.getCharSequence("rg"));
TextView textView1 = (TextView)findViewById(R.id.txt1);
textView1.setText(bundle.getCharSequence("rg1"));
TextView textView2 = (TextView)findViewById(R.id.txt2);
textView2.setText(bundle.getCharSequence("rg2"));
TextView textView3 = (TextView)findViewById(R.id.txt3);
textView3.setText(bundle.getCharSequence("rg3"));
TextView textView4 = (TextView)findViewById(R.id.txt4);
textView4.setText(bundle.getCharSequence("rg4"));
TextView textView5 = (TextView)findViewById(R.id.txt5);
textView5.setText(bundle.getCharSequence("rg5"));
TextView textView6 = (TextView)findViewById(R.id.txt6);
textView6.setText(bundle.getCharSequence("rg6"));