Android-Intent传参

Activity之间的数据传递

1.Intent.putExtra(String name,数据类型 value)

2.Bundle bundle = null
bundle.put

package com.maizi.edu.bundle;

import …

public class MainActivity extends AppCompatActivity{

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

     Button bth = (Button) findViewById(R.id.bth_start);
     bth.setOnClickListener(new View.OnClickListener(){
        @Override
        public void onClick(View v){
            Intent intent = new Intent(MainActivity.this, SecondActivity.class);
            intent.putExtra("news_title", "安卓开发行情的新闻")
            intent.putExtra("comment_count", 135);
            startActivity(intent);
        }
    });
}

}

package com.maizi.edu.bundle;

import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;

public class SecondActivity extends Activity{

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

    TextView paramsTextView = (TextView) findViewById(R.id.tv_params);

    String newsTitleString = getIntent().getStringExtra("news_title");
    paramsTextView.setText(newsTitleString);

    int count = getIntent().hetIntExtra("comment_count", 0);
    TextView commentCountTextView = (TextView) findViewById(R.id.tv_comment_count);
    commentCountTextView.setText(count+"");
}

}

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="传递的数据是"/>

<TextView
    android:id="@+id/tv_params"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=""/>

<TextView
    android:id="@+id/tv_comment_count"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text=""/>

   <activity
       android:name=".MainActivity">
       <intent-filter>
           <action android:name="android.intent.action.MAIN" />
           <category android:name="android.intent.category.LAUNCHER" />
       </intent-filter>
   </activity>

    <activity android:name=".SecondActivity" />

<TextView
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"
    android:text="第一个Activity"/>

<Button
    android:id="@+id/bth_start"
    android:text="启动并传递参数"
    android:layout_width="wrap_content" 
    android:layout_height="wrap_content"