Question

我现在的场景是，我将开始2个活动来获取一些String值，然后在第3个活动上，我将捕获String值，然后我将比较捕获的String并更改图像源

示例：

选择程序
选择日（星期一〜星期五）
捕获从程序到日期的String传递，并将两者合并并传递给使用ImageView的活动

我再次编辑了代码。

第一项活动

enter code here

public class TestSchedule extends Activity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test_schedule);
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.test_schedule, menu);
    return true;
}

public void SSD(View view){
    String programme = "SSD";
    Intent intent = new Intent(TestSchedule.this,TextDay.class);
    intent.putExtra("prog", programme);
    startActivity(intent);
    }

public void EIS(View view){
    String programme = "EIS";
    Intent intent = new Intent(TestSchedule.this,TextDay.class);
    intent.putExtra("prog", programme);
    startActivity(intent);
    }

public void IS(View view){
    String programme = "IS";
    Intent intent = new Intent(TestSchedule.this,TextDay.class);
    intent.putExtra("prog", programme);
    startActivity(intent);
    }

public void IT(View view){
    String programme = "IT";
    Intent intent = new Intent(TestSchedule.this,TextDay.class);
    intent.putExtra("prog", programme);
    startActivity(intent);
    }

}

第二项活动

public class TextDay extends Activity {

String programme;

private void getData(){
    Bundle extras = getIntent().getExtras();
    if(extras != null){
        programme = extras.getString("prog");
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_text_day);
    getData();
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.text_day, menu);
    return true;
}

public void monday(View view){
    if(programme.equals("SSD")){
        String programDay = "SSDMon";
        Intent intent = new Intent(TextDay.this, TestShow.class);
        intent.putExtra("progDay", programDay);
        startActivity(intent);
    }
    if(programme.equals("EIS")){
        String programDay = "EISMon";
        Intent intent = new Intent(TextDay.this, TestShow.class);
        intent.putExtra("progDay", programDay);
        startActivity(intent);
    }
    if(programme.equals("IS")){
        String programDay = "ISMon";
        Intent intent = new Intent(TextDay.this, TestShow.class);
        intent.putExtra("progDay", programDay);
        startActivity(intent);
    }
    if(programme.equals("IT")){
        String programDay = "ITMon";
        Intent intent = new Intent(TextDay.this, TestShow.class);
        intent.putExtra("progDay", programDay);
        startActivity(intent);
    }   
    }
}

将捕获并更改图像源的第3个活动

enter code here

public class TestShow extends Activity {

ImageView image;
String table;

private void getData(){
    Bundle extras = getIntent().getExtras();
    if(extras != null){
        table = extras.getString("progDay");
    }
}

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_test_show);
    getData();
    image = (ImageView) findViewById(R.id.showTimeTable);
    if(table.equals("SSDMonday")){
        image.setImageResource(R.drawable.ssd_mon);
    }
    if(table.equals("EISMonday")){
        image.setImageResource(R.drawable.eis_mon);
    }
    if(table.equals("ISMonday")){
        image.setImageResource(R.drawable.is_mon);
    }
    if(table.equals("ITMonday")){
        image.setImageResource(R.drawable.it_mon);
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.test_show, menu);
    return true;
}

}

Answer 1

开始新活动时使用捆绑包

Bundle b = new Bundle;

b.putString（S，密钥）; intent.putExtra（b）中; startActivity（意向）;

更多： http://www.vogella.com/articles/AndroidIntent/article.html

Answer 2

喜欢这个

发送活动活动

Intent newActivity1 = new Intent(ActivityA.this, ActivityB.class);
newActivity1.putExtra("choose_programme", position);
startActivity(newActivity1);

接收活动活动

String value = getIntent().getExtras().getString("choose_programme");

Answer 3

通常，解决方法是将String作为额外的意图，并与此额外字符串一起将意图发送给其他活动

检查此链接以获取有关如何实现此操作的更多详细信息： Pass a String from one Activity to another Activity in Android

评论部分的回答。

Answer 4

1将图像发送到下一个活动...您可以发送位图，因为它实现了Parcelable

private void sendImage() {
  //Getting the Bitmap from the imageView
  BitmapDrawable drawable = (BitmapDrawable) imageView.getDrawable(); 
  Bitmap bitmap = drawable.getBitmap();

  Intent intent = new Intent(MainActivity.this, NextActivity.class);
  intent.putExtra("PROGRAMME", "PROGRAMME_VALUE");
  intent.putExtra("DAY", "DAY_VALUE");
  intent.putExtra("IMAGE", bitmap);
  startActivity(intent);
}

2在NextActivity中获取图像

Bundle extras = getIntent().getExtras();
if (extras != null) {
   // Bitmap
   Bitmap image = (Bitmap) extras.get("IMAGE");
   if (image != null) {
     imageView.setImageBitmap(image);
   }
   // String value
   String programmeValue = intent.getString("PROGRAMME");
   String dayValue = intent.getString("DAY");
}

如何从不同的活动传递并获取String值？

4 个答案: