（一）Activity参数传递

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1.主Activity,用于启动另一个Activity（）
public class MainActivity extends Activity {    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        System.out.println("onCreate");

        findViewById(R.id.btnStartBAct).setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent=new Intent(MainActivity.this,BActivity.class);
                intent.putExtra("data","Hello Henry");                                  //进行参数传递
                //startActivity(new Intent(MainActivity.this,BActivity.class));
                startActivity(intent);
            }
        });
    }

    @Override
    protected void onStart()
    {
        super.onStart();
        System.out.println("onStrart");
    }
    @Override
    protected void onRestart()
    {
        super.onRestart();
        System.out.println("onRestart");
    }
    @Override
    protected void onStop()
    {
        super.onStart();
        System.out.println("onStop");
    }
    @Override
    protected void onResume()
    {
        super.onResume();
        System.out.println("onResume");
    }
    @Override
    protected void onPause()
    {
        super.onPause();
        System.out.println("onPause");
    }
    @Override
    protected void onDestroy()
    {
        super.onDestroy();
        System.out.println("onDestroy");
    }

    @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);
    }
}
2.从Activity 被MainActivity启动

public class BActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_b);
        System.out.println("B onCreate");

        Intent intent=getIntent();              //获取MainActivity传递过来的Intent

        TextView tv= (TextView) findViewById(R.id.tv);   
        tv.setText(intent.getStringExtra("data"));           //调用Intent的getStringExtra("data")方法取出数据

    }

    @Override
    protected void onStart()
    {
        super.onStart();
        System.out.println("B onStrart");
    }
    @Override
    protected void onRestart()
    {
        super.onRestart();
        System.out.println("B onRestart");
    }
    @Override
    protected void onStop()
    {
        super.onStart();
        System.out.println("B onStop");
    }
    @Override
    protected void onResume()
    {
        super.onResume();
        System.out.println("B onResume");
    }
    @Override
    protected void onPause()
    {
        super.onPause();
        System.out.println("B onPause");
    }
    @Override
    protected void onDestroy()
    {
        super.onDestroy();
        System.out.println("B onDestroy");
    }


    @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_b, 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);
    }
}
3.传递数据包Bundle
3.1 MainActivity中的

findViewById(R.id.btnStartBAct).setOnClickListener(new View.OnClickListener() {

        @Override
        public void onClick(View view) {
            Intent intent=new Intent(MainActivity.this,BActivity.class);
            //intent.putExtra("data","Hello Henry");

            //传递数据包
            Bundle bundle=new Bundle();
            bundle.putString("name","henry");       //往数据包中添加数据
            bundle.putInt("age",24);
            intent.putExtras(bundle);               //将数据包添加到Intent中

            //startActivity(new Intent(MainActivity.this,BActivity.class));
            startActivity(intent);
        }
    });
}
3.2  BActivity中的

Intent intent=getIntent();
Bundle bundle=intent.getExtras();        //接收数据包

TextView tv= (TextView) findViewById(R.id.tv);
//tv.setText(intent.getStringExtra("data"));
tv.setText(String.format("name=%s,age=%d",bundle.getString("name"),(int)bundle.get("age")));    //调用Bundle的getXXX（）函数获取数据

（一）Activity参数传递

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原文地址：http://www.cnblogs.com/ql698214/p/5071371.html