Android作业

1.图片选择器

java代码
package com.example.mpyypm.flower;

import android.media.Image;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.widget.ImageView;
import android.widget.RadioButton;
import android.widget.RadioGroup;

public class FloweerActivity extends AppCompatActivity {
private ImageView img_flower;
private RadioGroup flower1;
private RadioGroup flower2;
private RadioButton rose;
private RadioButton xunyicao;
private RadioButton yinghua;
private RadioButton baihe;
private RadioButton youcaihua;
private RadioButton lanhua;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_floweer);
img_flower = (ImageView) findViewById(R.id.img_flower);
flower1=(RadioGroup) findViewById(R.id.flower1);
flower2=(RadioGroup) findViewById(R.id.flower2);
rose=(RadioButton) findViewById(R.id.rose);
xunyicao=(RadioButton) findViewById(R.id.xunyicao);
yinghua=(RadioButton) findViewById(R.id.yinghua);
baihe=(RadioButton) findViewById(R.id.baihe);
youcaihua=(RadioButton) findViewById(R.id.youcaihua);
lanhua=(RadioButton) findViewById(R.id.lanhua);

rose.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (rose.isChecked()){
img_flower.setImageResource(R.drawable.rose);
flower1();
}
}
});
baihe.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (baihe.isChecked()){
img_flower.setImageResource(R.drawable.baihe);
flower1();
}
}
});
yinghua.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (yinghua.isChecked()){
img_flower.setImageResource(R.drawable.yinghua);
flower1();
}
}
});
xunyicao.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (xunyicao.isChecked()){
img_flower.setImageResource(R.drawable.xunyicao);
flower2();
}
}
});
youcaihua.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (youcaihua.isChecked()){
img_flower.setImageResource(R.drawable.youcaihua);
flower2();
}
}
});
lanhua.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if (lanhua.isChecked()){
img_flower.setImageResource(R.drawable.lanhua);
flower2();
}
}
});
}
void flower1(){
baihe.setChecked(false);
youcaihua.setChecked(false);
lanhua.setChecked(false);
}
void flower2(){
rose.setChecked(false);
xunyicao.setChecked(false);
yinghua.setChecked(false);
}
}

运行结果如下

***坐标

java代码
package com.example.mpyypm.xy;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.KeyEvent;
import android.view.MotionEvent;
import android.widget.ImageView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
private ImageView xq;
private long time;

@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
xq = (ImageView) findViewById(R.id.xq);
}

@Override
public boolean onTouchEvent(MotionEvent event) {
if (event.getAction()==MotionEvent.ACTION_DOWN){
String pos= "";
float x= event.getX();
float y =event.getY();
xq.setPadding((int)x-100,(int)y-300,0,0);
pos="x轴坐标"+x+"y轴坐标"+y;
Toast.makeText(this,pos,Toast.LENGTH_SHORT).show();
}
return super.onTouchEvent(event);
}

@Override
public boolean onKeyDown(int keyCode, KeyEvent event) {
if(event.getKeyCode()==KeyEvent.KEYCODE_BACK){
exit();
return false;
}
return super.onKeyDown(keyCode, event);
}

void exit(){
if(System.currentTimeMillis()-time>2000){
Toast.makeText(this,"确定退出!",Toast.LENGTH_SHORT).show();
time=System.currentTimeMillis();
}else {
finish();
}
}
}
运行结果

存在的问题
图片选择器中存在一点问题，有两种花，我选中了以后屏幕会显示这张图片，但是下面的按钮没有显示被选中，不知道问题在哪里。